Method and means for cooling fluids



Feb. 27, 1940. H. a. SCHAEFER v METHOD AND MEANS FOR COOLING FLUIDS Filed April i l/1957 INVENTOR.

j eizry 6'. Jaime/e7" ATTORNEY.

Patented Feb. 27, 1940 g I v IfiUNl-TED STATES PATENT OFFICE. I v 2,191,864 v a METHOD AND MEANS FOR COOLING FLUIDS v Henry G. Schaei'er, New York; N. Y.

Application April 14, 1937, Serial No. 136,823

' ,2 Claims. (oi. s'2 152) I The present invention relates to the method a substantial body of fluid in the tank, or recepof, and means for, cooling liquids and has more tacle at all times, inorder to afford a substantial particular reference to the method of, and means surface area to permit the evaporation or vaporfor, cooling liquid by evaporation, more especially ization to readily take place. This evaporation b accelerated evaporation or vaporization obtained or vaporization is simply and efficiently achieved I by reduction of the air pressure upon the liquid. by a pressure nozzle B affording a fluid jet di- The object of the invention is to provide a rected through a restricted opening B so as to more generally simplified and eflicient apparatus create a vacuum or partial vacuum above the and system for cooling liquids and to this end, surface area of the fluid in the upper portion the invention, generally stated, comprises means of the tank or receptacle A. The fluid particles for creating a partial vacuum in a closed chamof the jet force the air particles through a conber so as to promote accelerated vaporization of duit C into a condensing or separating chamber the fluid contained therein by a continuous cyclic D having a vent or stack E which may be prooperation. vided if desired, with a blower fan F adapted to More specifically stated, the invention combe used in conjunction with an air inlet D which prises a cyclic circulatory system including a may be opened when the fan is in operation. In pressure jet, the pressure jet reducing the air order to minimize the loss of fluid in the form pressure in a closed. preferably hermetically of vapor up the stack E, baflle plates might also sealed. container on the liquid contained therein, be used. Irrespective of the form of control locausing accelerated vaporization thereof and cated in the stack, the stack is so proportioned 20 carrying the vapor to a condensing chamber with respect to the condenser thata portion of where the vapor is partly condensed and added the vapor condenses in the chamber D and is to the circulating medium employed to operate delivered by means of a discharge conduit G to the pressure jet, the circulation and pressure in pump'I-I which drives it through a conduit J terthe jet being maintained by a pumping unit. minating. in the pressure nozzle B. An inlet K 25 In the drawing accompanying this specificain the condensing chamber D affords means to tion, several embodiments of the invention are replace any fluid lost in the circulatory system. illustrated although it is to be understood that This replacement is, however, generally negligisuch embodiments are merely for the purpose of ble since the condensed vapor from the tank A affording a clear understanding of the underlying is added. to the vacuum producing system and principles of the invention so that those skilled concurrently with the removal of the fluid from in the art may readily understand it without, tank D.

however. limiting the invention to the specific Referring more particularly to the multiple details shown therein. stage arrangement shown in Fig. 2, a condenser In said drawing: tank L similar to the tank D of Fig. 1 is cona Fig. l is a vertical section of my invention nected to a pump M having a pressure nozzle N partly fragmentary and partly diagrammatic, and located in an evaporating or vaporizing chamber F 2 is a similar view of a multiple stage ar- P similar to the chamber A of Fig. 1, the jet of rangement of the invention. nozzle N being directed through the restricted 40 n in n ow y w y of a mor e ailed d tube Q to function as an aspirator so as to cool 40 scription. an evaporating or vaporizing vessel or the liquid in the vessel or chamber P, which is tank A has a fluid inlet A communicating with circulated to a remote point by the inlet P and the interior thereof for the purpose of supplying outlet P" corresponding to the inlet and outlet the liquid to the tank, and an outlet A" preferand A" respectively of Fig. l. The fluid in ably at its lower end for discharging the fluid the condensing chamber L is. however. subjected 45 from the tank. The vessel or tank A convento an initial cooling by means of an arrangement iently is of such a shape as to completely drain also similar to that shown in Fig. l. the cooled toward the outlet A", in the specific illustration fluid of receptacle R being circulated through taking the form of a sphere. This receptacle. condenser coils S by way-of conduits S and S" 60 or container. contains a body of liquid which is located in the chamber L, the fluid in the recepcirculated to any convenient remote point to tacle or chamber R being cooled by the removal afford a supply of cooled liquid for any desired of the latent heat caused by the vaporization purpose for instance. air conditioning apparatus. effected by the reduction of the air pressure by The fiow of water through the outlet and the the fluid jet issuing from the pressure nozzle R as fiuid coming in at the inlet is regulated to afford circulated by pumping unit T. The conduits U u and V are connected to a condenser (not shown) similar to condenser D.

While the present invention is not limited to the use of the same liquid in the cyclic circulatory system as the liquid to be cooled, nevertheless, such identity is preferred because the vapor of the fluid to be cooled is added to the fluid of the circulatory system.

It is claimed: v

1. Liquid cooling means, including a tank for confining a body of liquid to :be cooled and means for reducing to a desired degree the pressure above the liquid in the tank and to remove gases and vapors from said tank, comprising an independent liquid circulating system including an aspirator arranged in open communication with the interior of the tank, a pump for forcing liquid through said aspirator under pressure, a reservoir for receiving the liquid and entrained vapors from the aspirator. said reservoir'being connected between the aspirator and the pump to form a circulatory system, and means for condensing a portion of the entrained vapors and exhausting the remaining portion thereof to atmosphere, said last named 'means' including means for circulating a stream of air through .said reservoir in contact with the liquid and.

entrained vapors from the aspirator.

,2. The continuous method of cooling a confined body of liquid and vapors, which comprises the setting up of a circulationot liquid under pressure above the confined liquid to thereby exhaust confined vapors and cause a reduction in pressure, a vaporization of said confined liquid and the entrainment of the vaporization products in I said circulated liquid, .then separating a portion of the entrained vapors by contacting :said cir-' culated liquid and entrained vapors with a stream of air to thereby cause condensation-of a portion of the vaporsand the exhaust. of the other portion thereof to atmosphere, and thereafteradding to the circulated liquid the liquid componen of said vapors.

. HENRY G. SCHAEFER. 

